When to do first ATF drain/fill?

If you're taking a vote.....
Do it after your return. Settle on a mileage (20k, 30k...whatever) after your return.
While "a couple of weeks" is long enough to ensure you did everything right, there's no need to complicate your long trip prep.


Are you referring to a turbocharger?
Or crossover pipes …
 
Fluid will still be good at 15k miles, it's suspended contaminants you want to remove and they all come out with the ATF, whatever internal filter lets thru. After that you just rejuvenate ATF with drain and fills. From personal experience, that early full ATF replacement takes out quite a bit of dirt and subsequent changes show pretty clean ATF.
 
None of my vehicles even call it out, so I typically do it every 60-75K for first service, then every 30K or so afterwards.

My Sons Santa Fe is actually due, and I bought the fluid, but it was so hot outside that after I did the front brakes and then his oil change I ran out of energy. I decided to post-pone it until Fall.
 
I had an '18 Kia optima with the 6 speed auto and I did a simple d&f at around 30k with max life. I think that's a good mileage. The first drain had a decent amount of material. I did one more a couple hundred miles later and it was like new.
Pretty simple process but you really need to do a level check at the correct temperature from the sensor via obd2 instead of a temperature gun. In my experience there was a difference.
 
I am a do it early to get the good chunk of breakin out. I would have done it at 10,000 miles. I bet 60% of breaking crud is the at that mileage. Might as well get that high level out early. I did 3 early trans and diff dumps on my Hyundai after seeing my wife’s RAV4 rear diff dump black diff oil at 22,000 miles. I had dirty oil in my Hyundai rear diff at 2,500 miles if I remember the mileage correctly. It took 28,000 miles to stop the dirty rear diff shedding. I think I did 3 or 4 dump at 28,000. I was doing it more as a research posting on the Hyundai forums, and surprised how dirty it kept come out at early mileage break in.
 
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